BMW

2025 BMW M850i xDrive Convertible

G14 (2nd generation) · Convertible · AWD · 8-speed automatic · US market

Convertible
Grand tourer

Add to comparison Back to browse

Power

390 kW

Torque

750 N·m

Top speed

249 km/h

Curb weight

2148 kg

2025 BMW M850i xDrive Convertible joins the BMW expansion with source-backed core specifications. The seeded observations prioritize official BMW PressClub technical data and EPA economy/range records; ambiguous market-specific or unsourced figures are omitted rather than guessed.

Specifications by source

Each figure carries an evidence mark and a text label; expand a value for its full provenance — citation, verification, test conditions, and any alternate figures.

A. Acceleration

0–100 km/h3.90 sManufacturer claimBMW

VerifiedMedium confidence

Originally reported as 3.9 s; stored canonically.

Source

BMW — The new BMW 8 Series Convertible.Manufacturer

Press release · Accessed 22 Jun 2026 · Body copy - M850i xDrive Convertible accelerates from 0 to 100 km/h in 3.9 seconds

BMW global PressClub exact 0-100 km/h claim for the M850i xDrive Convertible; marked medium because the seed variant is US-market and the citation is global-market press material.

Improve this figure

0–100 mph8.30 sIndependent testCar and Driver

VerifiedMedium confidence

Originally reported as 8.3 s; stored canonically.

Source

Car and Driver — 2019 BMW M850i xDrive Convertible — More Than a Rebadged 6Publication

Jared Gall · Instrumented road test · Published 12 Apr 2019 · Accessed 22 Jun 2026 · C/D Test Results - Zero to 100 mph: 8.3 sec

Car and Driver instrumented zero-to-100 mph: 8.3 s for a 2019 M850i xDrive Convertible. Same G14 M850i xDrive convertible body/drivetrain, earlier model year.

Improve this figure

0–200 km/h13.5 sIndependent testauto motor und sport

VerifiedMedium confidence

Source

auto motor und sport — BMW M850i xDrive Cabrio und Mercedes S 560 Cabrio: Technische DatenPublication

Instrumented road test · Accessed 22 Jun 2026 · BMW M850i Cabriolet xDrive column - Beschleunigung - 0-200 km/h

auto motor und sport instrumented test table for the G14 BMW M850i xDrive Cabriolet. Kept MEDIUM confidence because it is an older same-generation test row.

Improve this figure

0–60 mphi3.80 sManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 3.8 s; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official manufacturer 0-60 mph claim.

Improve this figure

B. Dimensions

Ground clearance127 mmManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 5 in; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official ground clearance.

Improve this figure

Height1346 mmManufacturer claimBMW

Verified

C. Engine & Powertrain

Cylinder count8Manufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

8-cylinder engine.

Improve this figure

Engine displacement4.4 LManufacturer claimBMW

VerifiedHigh confidence

Originally reported as ; stored canonically.

D. Fuel Economy

Estimated range (city)i492 kmCalculated—

Verified

Originally reported as 492.459262 km; stored canonically.

Calculated from Fuel tank capacity · Fuel economy (city).

Estimated range (combined)i550 kmCalculated—

Verified

Originally reported as 550.395643 km; stored canonically.

Calculated from Fuel tank capacity · Fuel economy (combined).

Estimated range (highway)

E. Performance

Power-to-weight ratioi181.5 kW/tCalculated—

Verified

Originally reported as 181.546685 kW/t; stored canonically.

Calculated from Peak power · Curb weight.

Top speed249 km/hManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 155 mph; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Electronically limited top speed; higher value reflects optional performance tire / driver package when noted.

F. Practicality

Cargo volume351 LManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 12.4 ft³; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official luggage/cargo volume; lower figure where a split value is published.

Improve this figure

Seats4Manufacturer claimBMW

Verified

G. Pricing

Base price (as tested market)i117000 $HomologationUS EPA

VerifiedHigh confidence

Source

US EPA — EPA Fuel Economy: BMW vehicle 47701Government

Government record · Accessed 22 Jun 2026 · EPA side-by-side page

MSRP shown on the EPA side-by-side vehicle page.

Improve this figure

H. Tires & Wheels

Front tire size245/35R20 95Y XLManufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official standard front tire size.

Improve this figure

Rear tire size275/30R20 97Y XLManufacturer claimBMW

VerifiedHigh confidence

9. Weight

Curb weight2148 kgManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 4736 lb; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official curb weight.

Improve this figure

Sources

Backed by 6 source documents. Expand any value for its full provenance — citation, verification, test conditions, and alternate figures.

Help complete this profile

Performance

Lateral acceleration
Add Lateral acceleration2025 BMW M850i xDrive Convertible · Performance

Acceleration

0–30 mph
Add 0–30 mph2025 BMW M850i xDrive Convertible · Acceleration
50–70 mph
Add 50–70 mph2025 BMW M850i xDrive Convertible · Acceleration
Quarter-mile elapsed time
Add Quarter-mile elapsed time2025 BMW M850i xDrive Convertible · Acceleration
Quarter-mile trap speed
Add Quarter-mile trap speed2025 BMW M850i xDrive Convertible · Acceleration

Braking

High confidence

Originally reported as 53 in; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official height in inches.

Improve this figure

Length4856 mmManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 191.2 in; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official length in inches.

Improve this figure

Wheelbase2822 mmManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 111.1 in; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official wheelbase.

Improve this figure

Width1902 mmManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 74.9 in; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official width in inches.

Improve this figure

4395 cc

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official displacement.

Improve this figure

Engine layoutV8Manufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

V8 engine layout.

Improve this figure

Engine placementFrontManufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Front-engine layout.

Improve this figure

Induction typeTwin-turboManufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Twin-turbo induction.

Improve this figure

Number of gears8Manufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

8 forward gears.

Improve this figure

Peak power390 kWManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 523 hp; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

N63 4.4-liter V8 output.

Improve this figure

Peak torque750 N·mManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 553 lb-ft; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

N63 4.4-liter V8 torque.

Improve this figure

Transmission typeTorque-converter automaticManufacturer claimBMW

VerifiedHigh confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Transmission type per source data.

Improve this figure

i

695 km

Calculated

—

Verified

Originally reported as 695.236581 km; stored canonically.

Calculated from Fuel tank capacity · Fuel economy (highway).

Fuel economy (city)i13.8 L/100kmHomologationUS EPA

VerifiedHigh confidence

Originally reported as 17 mpg; stored canonically.

Source

US EPA — EPA Fuel Economy: BMW vehicle 47701Government

Government record · Accessed 22 Jun 2026 · EPA vehicle detail

EPA city fuel economy.

Improve this figure

Fuel economy (combined)i12.4 L/100kmHomologationUS EPA

VerifiedHigh confidence

Originally reported as 19 mpg; stored canonically.

Source

US EPA — EPA Fuel Economy: BMW vehicle 47701Government

Government record · Accessed 22 Jun 2026 · EPA vehicle detail

EPA combined fuel economy.

Improve this figure

Fuel economy (highway)i9.8 L/100kmHomologationUS EPA

VerifiedHigh confidence

Originally reported as 24 mpg; stored canonically.

Source

US EPA — EPA Fuel Economy: BMW vehicle 47701Government

Government record · Accessed 22 Jun 2026 · EPA vehicle detail

EPA highway fuel economy.

Improve this figure

Fuel tank capacity68.1 LManufacturer claimBMW

VerifiedHigh confidence

Originally reported as 18 gal; stored canonically.

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official fuel tank capacity.

Improve this figure

High confidence

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official seating count.

Improve this figure

Source

BMW — The First-Ever 2019 BMW 8 Series ConvertibleManufacturer

Official specification · Accessed 22 Jun 2026 · Technical data – BMW M850i xDrive Convertible

Official standard rear tire size.

Improve this figure

60–0 mph braking distance

70–0 mph braking distance

100–0 mph braking distance

Lap Times

Lap time
Add Lap time2025 BMW M850i xDrive Convertible · Lap Times

Engine & Powertrain

Redline
Add Redline2025 BMW M850i xDrive Convertible · Engine & Powertrain

Fuel Economy

Observed economy range
Add Observed economy range2025 BMW M850i xDrive Convertible · Fuel Economy

Practicality

Towing capacity (braked)
Add Towing capacity (braked)2025 BMW M850i xDrive Convertible · Practicality

Aerodynamics

Drag coefficient (Cd)
Add Drag coefficient (Cd)2025 BMW M850i xDrive Convertible · Aerodynamics